渠系节点三维流场的试验研究

叶瑞禄 张耀哲

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中国农村水利水电 ›› 2018 ›› (1) : 145-149.
水工建筑

渠系节点三维流场的试验研究

  • 叶瑞禄1,张耀哲2
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摘要

渠系节点三维流场的研究,对于河流、渠道等明渠水流流场的变化规律具有重大实际指导意义。通过vectrino plus小威龙三维流速仪在不同水位及流量条件下对渠系节点进行流速观测,研究节点附近水域三维流速沿水深的分布,分析各工况下口门区、明渠段及主河道上下游表层及底层节点的三维流场的分布规律。研究结果揭示了渠系节点处水流运动的非定常特性,口门区水流结构表现为横向环流、立轴环流和次生副流的叠加,流速分布与正常明渠流动存在差异。

Abstract

The research on 3D flow field of canal system node is of great practical significance to the change of flow field in rivers and channels. In this paper,the flow field observation of canal system node is introduced by 3D current meter under different water levels and flow conditions. By studying the distribution of 3D flow velocity along the depth near the node,the distribution law of the 3D flow field in entrance area,open channel section and upstream and downstream of the major river are summarized. The experimental results reveal that the unsteady characteristics of water flow at the canal node. The flow structure of the entrance area is superposited by lateral circulation,vertical axis circulation and secondary flow. Velocity distribution is different from normal open channel.

关键词

渠系节点 / 三维流场 / 三维流速 / 副流叠加

Key words

canal system node / 3D flow velocity / 3D flow field / secondary flow superposition

基金

水利部公益性行业专项经费项目( 201301016-01) 。

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叶瑞禄 张耀哲. 渠系节点三维流场的试验研究[J].中国农村水利水电, 2018(1): 145-149

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